Slotting and tenoning machine



0 Sept. 28, 1948. A. BOUCHER ETAL SLOTTING AND TENONING MACHINE 2 Sheets-Sheet l Fi 1ed Feb. 3, 1947 A. BOUCHER E'IAL SLOTTI ENG AND TE NONING MACHINE Sept. 28, 1948 2 Sheets-Sheet 2 Filed Feb Patented Sept. 28, 1948 SLOTTING AND TENONING MACHINE Auguste Boucher and Lucien Parveau,- Vignols, France Application February 3, 1947, Serial No. 726,036 In France February 27, 1946 Claims. 1

Our invention has for its object a machine allowing through the agency of simple and sturdy arrangements the execution of mortises or tenons chiefly in wood.

When operating as a slotting machine, our improved machine controls a rocking chisel or cutter kniie adapted to groove the mortise and two mortise chisels assuming a rectilinear reciprocatin movement cutting the walls of said mortise. The control of these tools is obtained through the same driving shaft by means of mechanisms which are adjusted as required by the mortise V to be executed.

Through this novel method, we obtain mortises with rectilinear bottom and sides the surfaces of which are splinter-free in contradistinction with chain-controlled machines or with machines adapted to bore adjacent holes which produce splinters that are detrimental 'both to appearance and to the possibility of assembling more particularly in the case of furniture making.

For the execution of a tenon, the knife is replaced by a tool including two chisels adapted to out the two opposite surfaces of the tenon.

Appended drawings show by way of example a form of execution of our improved machine which is supposed to be provided with tools operating in a horizontal plane while the Wood Work assumes a suitable translational movement under the action of any suitable mechanism not illustrated in the drawing and well known in the art. Conversely the wood work may be stationary and the machine is in this case rigid with 'a carriage adapted to move along a line parallel With or perpendicular to the work. In said drawings:

Fig. 1 is a view from above of the machine operating as a mortising machine. Two positions are illustrated for the tools.

Figs. 2, 3, and 4 are vertical cross-sections through the corresponding section lines II-II, TIL-III, IV-IV of Fig. 1.

Fig; Bis a diagrammatic showing of the operation of the rocking cutter knife.

Fig. 6 illustrates the operation of the mortise chisels.

Fig. 7 shows a detail ofthe apparatus working as a tenoning machine;

The driving shaft controlling simultaneously the cutter knife Y grooving the bottom of the mortise and the two mortising chisels P cutting the walls thereof, is constituted by a vertical shaft A rotating in the direction of the arrow f, Fig. 1.

In order to transform the rotary movement of the shaft A into a rocking movement of the knife carrying balance beam G we have provided by 2 way of example the following mechanism: on one hand the shaft A carries a plate B (Fig. 4) with a slideway b of dove-tailed shape inside which is adjustably secured a knob C assuming the desired eccentricity. A connecting rod D isrotatably carried by the knob C through the agency of a ball bearing E. On the other hand, the balance beam G carrying the knife cutter-is provided With a spindle F which latter is guided through the two roller bearings I inside a slideway H rigid with the cover Z and with the bottom 2 of the casing enclosing the mechanism. The balancebeam G is rigid with or secured to the connecting Fig. 5 shows that this mechanism constrains the edge 1/ of the knife Y to assume a substantially rect-iline ar movement which ensures the execution of an accurately flat bottom for the mortise except for the angles thereof which are given a slightly incurved shape.

The transmission described is equilibrated by a counterweight a on the plate B.

On the other hand, the shaft A constrains the mortising chisel P to assume rectilinear reciproeating movements under the action of the following arrangement:

The shaft A carries an eccentric K with a collar L cooperating with a connecting rod M pivoted in its turn to a lever N pivotally secured to an axis 0 rigid with the frame Zz and pivotally controlling twin connecting rods R (Fig. 4) cperatively pivoted to the mortising chisels P. The latter are guided during their reciprocation through their passing through carriages S adapted to move with dove-tailed guides U sliding inside slideways V under the action of control hand-wheels T.

Guiding play-compensating wedges W serve for guiding the end of the balance beam G and of the pivoting lever N.

The operation of the machine is clearly apparent from Figures 5 and 6 which show in lines of different types two positions of the rocking knife and of one of the mortising chisels. The latter of which the inner surfaces are toothed for releasing the shaving-s are adapted to rise and sink in opposition to one another.

The depth and width of the mortise are adjusted by acting on one hand on the knob C and the handwheels T on the other.

When it is desired to use the machine as a tenoning machine, we replace the knife Y by the tool illustrated in Fig. 7 and comprising two chisels X secured to either side of a central member :13 the width of which is equal to that of the tenon which is to be produced. The mortising chisels are intended in this case for cutting and truing the small sides of the touch.

Various constructional modifications may be brought to the example disclosed without unduly widening thereby the scope of the invention. In particular the machine may be designed for operating in a position different from horizontality.

What we claim is:

1. A mortising machine chiefly for Wood cutting, comprising a driving shaft, a plate with a slideway adapted to rotate therewith in a plane perpendicular thereto, a knob of adjustable eccentricity carried by said plate, a connecting rod pivotally secured to said knob, a spindle parallel to the shaft and pivotally carrying the other end of said connecting rod, means for adjusting the position thereof with reference to said shaft, an arm rigid with the connecting rod, a cutting tool carried by said arm, an eccentric disc carried by the driving shaft, a connecting rod fitted over said eccentric disc, a lever pivot-ally secured through a medial point to a stationary axis and through an end thereof to the free end of said last mentioned connecting rod, twin connecting rods pivotally secured to the other end of said lever to either side of the said arm carrying the cutting tool with reference to the shaft and mortising chisels carried by the ends of each of said last mentioned twin connecting rods.

2. A mortising machine, chiefly for wood cutting, comprising a driving shaft, a plate with aslideway adapted to rotate therewith in a plane perpendicular thereto, a knob of adjustable eccentricity carried by said plate, a connecting rod pivotally secured to said knob, a spindle parallel to the shaft and pivotally carrying the other end of said connecting rod, means for adjusting the position thereof with reference to said shaft, arm rigid with the connecting rod, a Cutting tool. carried by said an eccentric disc carried by the driving shaft, a connecting rod fitted over said eccentric disc, a. lever pivotally secured through a medial point to a stationary axis and through an end thereof to the free end of said last mentioned connecting rod, twin connecting rods pivotally secured to the other end of said. lever to either side of said arm carrying the cutting tool with reference to the shaft, mortising chisels carried by the ends of each of said last mentioned twin connecting rods, a stationary slideway located across the path of last mentioned twin connecting rods and a carriage adapted to slide in said slideways for defining the position of said tools in a direction perpendicular to the shaft.

3. A mortising machine, chiefly for Wood cutting, comprising a driving shaft, a plate with a slideway adapted to rotate therewith in a plane perpendicular thereto, a knob of adjustable eccentricity carried by said plate, a connecting rod pivotally secured to said knob, a spindle parallel to the shaft and pivotally carrying the other end of said connecting rod, mean for adjusting the position thereof with reference to said shaft, an arm rigid with the connecting rod, a cutting tool carried by said arm, an eccentric disc carried by the driving shaft, a connecting rod fitted over said eccentric disc, a lever pivotally secured through a medial point to a stationary axis and through an end thereof to the free end of said last mentioned connecting rod, twin connecting rods pivotally secured to the other end of said lever to either side of the said arm carrying the cutting tool with reference to the shaft, mortising chisels carried by the ends of each of said last mentioned twin connecting rods and guiding and play-compensating means for the pivotal lever and for the arm carrying the cutting tool.

4. A tenoning machine, chiefly for wood cutting, comprising a driving shaft, a plate with a slideway adapted to rotate therewith in a plane perpendicular thereto, a knob of adjustable eccentricity carried by said plate, a connecting rod pivo-tally secured to said knob, a spindle parallel to the shaft and pivotally carrying the other end of said connecting rod, means for adjusting the position thereof with reference to said shaft, an arm rigid with the connecting rod, a member showing the same thickness as the tenon to be machined, two parallel cutting members carried by said member to either side thereof carried by said arm, an eccentric disc carried by the driving shaft, a connecting rod fitted over said eccentric disc, a lever pivotally secured through a medial point to a stationary axi and through an end thereof to the free end of said last mentioned connecting rod, twin connecting rods pivotally secured to the other end of said lever to either side of the said arm with reference to the shaft and a mortising chisel carried by the end of each of said last mentioned twin connecting rods.

5. A mortising machine, chiefly for wood cutting, comprising a driving shaft, a plate with a slideway adapted to rotate therewith in a plane perpendicular thereto, a knob of adjustable eccentricity carried by said plate, a connecting rod pivota-lly secured to said knob, a spindle parallel to the shaft and pivotally carrying the other end of said connecting rod, means for adjusting the position thereof with reference to said shaft, an arm rigid with the connecting rod, means for securing selectively to the end of said arm a mortising knife or a system of parallel tenoning cutters, an eccentri disc carried by the driving REFERENCES CITED The following references are of record in the file of this patent:

FOREIGN PATENTS Country Date Sweden Aug. 21, 1912 Number 

